Runs entirely on your computer

Blur personal details before you share your screen.

One click finds emails, phone numbers, card numbers, payment addresses and ID numbers on any page and blurs them — so a screenshot never leaks what it shouldn't.

Version 0.2.0 · Free to use · Works in Chrome, Edge, Brave and Arc

Try it right here

This runs the extension's real detection code, in your browser. Type anything — it blurs as you go. Click a blurred bit to reveal it.

Your text

What a screenshot would show

Notice the order number isn't touched — card numbers are checked against the Luhn formula, so order and tracking numbers don't get flagged by mistake. Aadhaar and GSTIN carry checksums of their own and are verified the same way, so nothing is blurred on shape alone.

What it does

Scan and blur

One click finds emails, phone numbers, card numbers, UPI addresses, SSNs, Aadhaar, PAN, driving licences, GSTINs and IFSC codes — in the page text, inside form fields, and within embedded frames.

Blur anything else

Turn on click-to-blur and click any part of the page — a name, a face, a whole paragraph. Click again to bring it back.

Save or share

Save a screenshot with the blurs baked in, or leave them up while you share your screen. One click puts the page back.

Keep blurs across pages

Showing someone around a site? Switch on “Keep blurs” and what you blurred comes back when you return to a page — on ordinary sites and single-page apps alike — until you press Clear all or close the browser.

Installing it

Smudge isn't in the Chrome Web Store yet, so you load it from the folder you download. It takes about a minute.

  1. Download and unzip

    You'll get a folder called smudge. Put it somewhere you won't delete by accident — Chrome reads it from that location every time.

  2. Open your extensions page

    Paste chrome://extensions into the address bar. In Edge it's edge://extensions, in Brave brave://extensions.

  3. Turn on Developer mode

    The switch is in the top-right corner of that page.

  4. Click “Load unpacked”

    A button appears top-left once Developer mode is on. Select the smudge folder you unzipped.

  5. Pin it to your toolbar

    Click the puzzle-piece icon next to the address bar, find Smudge, and click the pin. That's it.

Why “Developer mode”?

It only means the extension didn't come from Chrome's store. You're loading a folder you downloaded and can read for yourself — no security settings are being changed. Chrome shows a “Disable developer mode extensions?” prompt on startup. That's expected, and you can dismiss it.

Updates aren't automatic

Because it's not in the store, new versions won't arrive on their own. Check back here now and then — the version number is at the top of this page.

What you blur never leaves your computer

Smudge reads whatever page is in front of you. That's a lot to ask someone to trust, so here is exactly what it can and can't do — no jargon.

  • Nowhere to send it. No website behind it, no company, no account.
  • Nothing is saved to disk. With Keep blurs on, your browser remembers where your blurs were — in memory, never the text — until you clear them or close it.
  • It can't watch you browse. Only the tab you're on, only after you click — or a site you've switched Keep blurs on for, and only after Chrome asks you.
  • It does nothing on its own. Not awake until you press the button, except on a site where you switched on Keep blurs.
  • No sign-up, ever. Nothing to create, nothing to log into.
  • Screenshots stay yours. Saved straight to your Downloads, nowhere else.

Don't take our word for it Every line Smudge is made of is published for anyone to read, and it's short enough to get through in one sitting. A promise about privacy is worth very little if nobody can check it.

Read the code
And one thing it can't do

Blurring covers things up on screen. The words underneath are still part of the web page itself, so treat this as a way to tidy up screenshots and screen shares — not as a lock on your information. Automatic blurring also won't catch names or street addresses, which is what click-to-blur is for. Give the page a look over yourself before you share it.